Dash-pot valve.



P. 'e.. was. DASH POT APPLICATION FILED NOV. 12, 1907.

Patented Feb. 9, 1909.

WITNESSES ATTORNEY INVENTOR rial 7565 BY STATES PATENT OFFICE.

"FREDERICK c. TEES, or PHILADELPHIA, PENNSYLVANIA.

DASH-POT VALVE.

specification; I

My invention relates to a new anduseful 1 c improvement in governors jfor dash. pots, an

particularly to the valve for regulating the action of dash-pots on steam-engines, and has forits object to provide an exceedingly sim 1e and effective ..device of this character y .means of which the fluid'will be allowed to escapewhen'theiston of the dash-pot descends, and when .8 "iston-ascends to break the vacuumform' I With these ends in view, this vention consistsin the details of construction andfgcomr /bination of elements hereinafterfset{forth and then specifically designated by; the claims.

describe its construction in detaiL'referring by letter to the accompanyingdrawing forming a part "of this specification,

whicha 1 Figure 1 is a vertical sectional viewfof my improved governor. Fig. 2, a section at the line w-m of Fig. 1 looking in the direction of thearrow. Fig. 3, an enlarged viewjof the valve stop and-bridge. f

z 7 n carrying out my invention as here em bodied, A represents the body of the valve,

' having the hollow chambers B and B formed therein, having the slots B cut in 40 two opposite sides of the hollow chamber B,

and the slots B cut in two sides of the cliamber B for the reception of the valve stops C I and C, which carry their bridges D and D, having the openings D and D cut therein. Leading from the hollow chamber B is the opening F, which is formed in the cap G, f this bemg fastened to'the body of the valve by means of the screws H. In the said openingF is threaded a valve-cock I. 5 Leading from the hollow chamber B is an opening F, into which is threaded the valve-cock I. The hollow chambers B and B are connected from their opposite ends by the hollow chamber J, and leading from this chamber J and the hollow chamber B.

is"the areas was by m n Specification of Letters Patent. Application filed November 12, 1907. Serial No. 401,185.

Patented Feb. 9, 1909.

which the connection is made with the dash- In Fig. 3 I have shown one of the valve stops, the body L being approximately theshape of a ball, having the extensions .-M and M and the bridge N formed integral there with.

In practice 'as the piston of the dash-pot descends thefluid in the dash-pot is forced into the hollow chamber J and into the chamber B, which forces the valve stop C downupon its valve-seat, thus closin that portion of'the valve. When this is one as pressure is formed which raises the valve 7o stop C from itsseat, thus allowing the fluid to pass around the valve and through the opening formed by the extensions, and out w of the opening Diand, where it will be 9.1-

lowed to gradually escape through the valvecock I. Conversely as the piston of, the dash-pot descendsa artialvacuumisformed' within the hollow ciamber .J,'which, com

v y 1 municating with the hollow chamber B lifts l In order that those skilled in 'thegart to 25 which this invention a pertains-mayunder stand howto make an use the[same ,I.will

the valve-sto C from its seat and all0ws..

i the gradual mgress'of air or 'other fluid to the cylinder of the dash-pot to relieve *the partial vacuum,-=as above described. This! alternate action of the valve-stops G and G is repeated each time the piston of the dash ipot descends and ascends, thus alternately relieving-the pressure and: the I vacuum created by the action of the dash-pot within the hollow chamber J of the valve body, A.

Having thus fully described my invention, what I claim as new and useful, is

, 1. In a valve of the character-described, the combination with the body of the valve,

a hollow chamber having a threaded inlet connection, a valve-cock inserted therein, a" valve-stop carrying its own bridge in said chamber, a second hollow chamber having a threaded outlet, a valve-cock inserted there- 'in, a second valve-stop carryingijts own bridge in said chamber, a third hollow chamber eonnecting the two opposite ends of the I;

aforesaid chambers and a threaded opening t forrmaking connection with thedashpot.

2. In a valve of the character described,

the combination withqhe body of the valve '105' p havinga hollow chamber, two slots cut in v I opposite sides thereof, a threaded opening leading therefrom having a valve-cock inserted therein, a valve-stop carrying its own bridge in said chamber, a second hollow chamber, two slots cut in opposite sides thereof, a third hollow chandler for connect- I 

